378

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Millennium: 1st millennium
Centuries:
Decades:
Years:
378 in various calendars
Gregorian calendar378
CCCLXXVIII
Ab urbe condita1131
Assyrian calendar5128
Balinese saka calendar299–300
Bengali calendar−215
Berber calendar1328
Buddhist calendar922
Burmese calendar−260
Byzantine calendar5886–5887
Chinese calendar丁丑(Fire Ox)
3074 or 3014
    — to —
戊寅年 (Earth Tiger)
3075 or 3015
Coptic calendar94–95
Discordian calendar1544
Ethiopian calendar370–371
Hebrew calendar4138–4139
Hindu calendars
 - Vikram Samvat434–435
 - Shaka Samvat299–300
 - Kali Yuga3478–3479
Holocene calendar10378
Iranian calendar244 BP – 243 BP
Islamic calendar252 BH – 251 BH
Javanese calendar260–261
Julian calendar378
CCCLXXVIII
Korean calendar2711
Minguo calendar1534 before ROC
民前1534年
Nanakshahi calendar−1090
Seleucid era689/690 AG
Thai solar calendar920–921
Tibetan calendar阴火牛年
(female Fire-Ox)
504 or 123 or −649
    — to —
阳土虎年
(male Earth-Tiger)
505 or 124 or −648

Year 378 (CCCLXXVIII) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Valens and Augustus (or, less frequently, year 1131 Ab urbe condita). The denomination 378 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Events[edit]

By place[edit]

Roman Empire[edit]

  • Spring – Emperor Valens returns to Constantinople and mobilises an army (40,000 men). He appoints Sebastian, newly arrived from Italy, as magister militum to reorganize the Roman armies in Thrace.
  • February – The Lentienses (part of the Alemanni) cross the frozen Rhine and raid the countryside. They are driven back by Roman auxilia palatina (Celtae and Petulantes), who defend the western frontier.
  • May – Battle of Argentovaria: Emperor Gratian is forced to recall the army he has sent East. The Lentienses are defeated by Mallobaudes near Colmar (France). Gratian gains the title Alemannicus Maximus.
  • Gothic War: Valens sends Sebastian with a body of picked troops (2,000 men) to Thrace and renews the guerrilla war against the Goths. He chases down small groups of Gothic raiders around Adrianople.
  • Fritigern concentrates his army at Cabyle (Bulgaria). The Goths are mainly centred in the river valleys south of the Balkan Mountains, around the towns of Beroea, Cabyle and Dibaltum.
  • July – Frigeridus, Roman general, fortifies the Succi (Ihtiman) Pass to prevent the "barbarians" from breaking out to the north-west (Pannonia).
  • Gratian sets out from Lauriacum (Austria) with a body of light armed troops. His force is small enough to travel by boat down the Danube. He halts for four days at Sirmium (Serbia) suffering from fever.
  • August – Gratian continues down the Danube to the "Camp of Mars" (frontier fortress near modern Niš), where he loses several men in an ambush by a band of Alans.
  • Fritigern strikes south from Cabyle, following the Tundzha River towards Adrianople, and tries to get behind the supply lines to Constantinople.
  • Roman reconnaissance detects the Goths. Valens, already west of Adrianople, returns back and establishes a fortified camp outside the city.
  • The Goths, with their wagons and families vulnerable to attack, withdraw back to the north. Roman scouts fail to detect the Greuthungi cavalry foraging further up the Tundzha valley.
  • Fritigern sends a Christian priest to the Roman camp with an offer of terms and a letter for Valens. The peace overtures are rejected.
  • August 9Battle of Adrianople: A large Roman army is defeated by the Thervingi. Valens is killed along with two-thirds of his army.
  • The Goths attack Adrianople; they attempt to scale the city walls with ladders but are repelled by the defenders, who drop lumps of masonry.
  • The Goths, supported by the Huns, move on to Constantinople. Their progress is checked by the Saracens, recruited from Arab tribes who control the eastern fringes of the empire.
  • October – The Greuthungi, faced with food shortages, split off and move west into Pannonia. Followed by their families, they raid villages and farmland.
  • Gratian recalls his military commander Flavius Theodosius, age 31, son of the executed general Theodosius the Elder, and appoints him co-emperor of the Eastern Roman Empire.

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